Finding the Fourth Proportional to 16,693.56, 23,037.39 and 9,139.77

Step by Step Solution

1. Step 1: Write the proportion equation
   16,693.56 : 23,037.39 = 9,139.77 : x
2. Step 2: Convert to fraction form
   16,693.56/23,037.39 = 9,139.77/x
3. Step 3: Cross multiply
   16,693.56x = 23,037.39 × 9,139.77
4. Step 4: Simplify right side
   16,693.56x = 210,556,446.00
5. Step 5: Solve for x
   x = 210,556,446.00/16,693.56
6. Step 6: Final answer
   x = 12,613.03